:root {
  --primary: #e63946;
  --primary-dark: #c1121f;
  --primary-light: #ff6b7a;
  --secondary: #457b9d;
  --secondary-dark: #1d3557;
  --accent: #e9c46a;
  --accent-warm: #f4a261;
  --accent-teal: #2a9d8f;
  --bg-body: #f7f8fc;
  --bg-card: #ffffff;
  --bg-card-hover: #ffffff;
  --bg-glass: rgba(255, 255, 255, 0.72);
  --bg-glass-border: rgba(255, 255, 255, 0.35);
  --bg-header: rgba(255, 255, 255, 0.82);
  --bg-elevated: #ffffff;
  --bg-subtle: #eef1f8;
  --text-main: #1a1a2e;
  --text-secondary: #4a4a68;
  --text-muted: #7a7a95;
  --text-inverse: #ffffff;
  --border-color: #e2e5f0;
  --border-light: #eef0f8;
  --shadow-sm: 0 1px 3px rgba(26, 26, 46, 0.06), 0 1px 2px rgba(26, 26, 46, 0.04);
  --shadow-md: 0 4px 16px rgba(26, 26, 46, 0.08), 0 2px 6px rgba(26, 26, 46, 0.04);
  --shadow-lg: 0 12px 40px rgba(26, 26, 46, 0.12), 0 4px 12px rgba(26, 26, 46, 0.06);
  --shadow-xl: 0 20px 60px rgba(26, 26, 46, 0.16);
  --shadow-glow: 0 0 24px rgba(230, 57, 70, 0.35);
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 20px;
  --radius-xl: 28px;
  --radius-pill: 999px;
  --font-sans: -apple-system, BlinkMacSystemFont, "PingFang SC", "Hiragino Sans GB", "Microsoft YaHei", "Noto Sans SC", "Helvetica Neue", Arial, sans-serif;
  --font-mono: "SF Mono", "Fira Code", "Fira Mono", "Roboto Mono", Menlo, Consolas, monospace;
  --transition-fast: 0.18s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-base: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 0.5s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-bounce: 0.4s cubic-bezier(0.34, 1.56, 0.64, 1);
  --max-width: 1200px;
  --header-height: 68px;
}

[data-theme="dark"] {
  --primary: #ff4d5e;
  --primary-dark: #e63946;
  --primary-light: #ff7a88;
  --secondary: #6ba3c7;
  --secondary-dark: #a8dadc;
  --accent: #f0d078;
  --accent-warm: #f4a261;
  --accent-teal: #4ecdc4;
  --bg-body: #0f0f1a;
  --bg-card: #1a1a2e;
  --bg-card-hover: #222240;
  --bg-glass: rgba(26, 26, 46, 0.78);
  --bg-glass-border: rgba(255, 255, 255, 0.08);
  --bg-header: rgba(15, 15, 26, 0.85);
  --bg-elevated: #1e1e35;
  --bg-subtle: #151528;
  --text-main: #eaeaef;
  --text-secondary: #b0b0c8;
  --text-muted: #7a7a95;
  --text-inverse: #0f0f1a;
  --border-color: #2a2a45;
  --border-light: #222240;
  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.3), 0 1px 2px rgba(0, 0, 0, 0.2);
  --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.35), 0 2px 6px rgba(0, 0, 0, 0.2);
  --shadow-lg: 0 12px 40px rgba(0, 0, 0, 0.45), 0 4px 12px rgba(0, 0, 0, 0.25);
  --shadow-xl: 0 20px 60px rgba(0, 0, 0, 0.55);
  --shadow-glow: 0 0 28px rgba(255, 77, 94, 0.4);
}

*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--header-height) + 16px);
  -webkit-text-size-adjust: 100%;
  text-size-adjust: 100%;
}

body {
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.75;
  color: var(--text-main);
  background-color: var(--bg-body);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
  transition: background-color var(--transition-base), color var(--transition-base);
}

img,
svg,
video {
  max-width: 100%;
  height: auto;
  display: block;
}

a {
  color: var(--primary);
  text-decoration: none;
  transition: color var(--transition-fast), opacity var(--transition-fast);
}

a:hover {
  color: var(--primary-dark);
}

ul,
ol {
  list-style: none;
}

button {
  font-family: inherit;
  font-size: inherit;
  cursor: pointer;
  border: none;
  background: none;
  color: inherit;
}

input {
  font-family: inherit;
  font-size: inherit;
  color: inherit;
}

::selection {
  background: var(--primary);
  color: #fff;
}

:focus-visible {
  outline: 2px solid var(--primary);
  outline-offset: 3px;
  border-radius: 4px;
}

.visually-hidden {
  position: absolute !important;
  width: 1px !important;
  height: 1px !important;
  padding: 0 !important;
  margin: -1px !important;
  overflow: hidden !important;
  clip: rect(0, 0, 0, 0) !important;
  white-space: nowrap !important;
  border: 0 !important;
}

/* ========== 滚动条 ========== */
::-webkit-scrollbar {
  width: 10px;
  height: 10px;
}

::-webkit-scrollbar-track {
  background: var(--bg-subtle);
}

::-webkit-scrollbar-thumb {
  background: var(--border-color);
  border-radius: var(--radius-pill);
  border: 2px solid var(--bg-subtle);
}

::-webkit-scrollbar-thumb:hover {
  background: var(--text-muted);
}

/* ========== 头部 ========== */
#site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  width: 100%;
  background: var(--bg-header);
  backdrop-filter: blur(20px) saturate(180%);
  -webkit-backdrop-filter: blur(20px) saturate(180%);
  border-bottom: 1px solid var(--border-light);
  transition: background-color var(--transition-base), border-color var(--transition-base), box-shadow var(--transition-base);
}

#site-header.scrolled {
  box-shadow: var(--shadow-md);
  border-bottom-color: transparent;
}

.header-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
  height: var(--header-height);
  display: flex;
  align-items: center;
  gap: 20px;
}

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
  color: var(--text-main);
  font-weight: 800;
  font-size: 1.2rem;
  letter-spacing: -0.02em;
  transition: transform var(--transition-bounce), opacity var(--transition-fast);
}

.logo:hover {
  transform: scale(1.04);
  color: var(--text-main);
}

.logo svg {
  width: 36px;
  height: 36px;
  flex-shrink: 0;
  border-radius: 8px;
  box-shadow: 0 2px 8px rgba(230, 57, 70, 0.3);
  transition: box-shadow var(--transition-base), transform var(--transition-bounce);
}

.logo:hover svg {
  box-shadow: var(--shadow-glow);
  transform: rotate(-4deg);
}

.logo-text {
  background: linear-gradient(135deg, var(--primary), var(--accent-warm));
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  white-space: nowrap;
}

.main-nav {
  flex: 1;
  display: flex;
  justify-content: center;
}

.main-nav ul {
  display: flex;
  align-items: center;
  gap: 4px;
  flex-wrap: wrap;
}

.main-nav a {
  display: block;
  padding: 8px 14px;
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--text-secondary);
  border-radius: var(--radius-pill);
  white-space: nowrap;
  position: relative;
  transition: color var(--transition-fast), background-color var(--transition-fast), transform var(--transition-fast);
}

.main-nav a::after {
  content: "";
  position: absolute;
  bottom: 2px;
  left: 50%;
  width: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--primary), var(--accent-warm));
  border-radius: var(--radius-pill);
  transform: translateX(-50%);
  transition: width var(--transition-base);
}

.main-nav a:hover {
  color: var(--primary);
  background: rgba(230, 57, 70, 0.07);
  transform: translateY(-1px);
}

.main-nav a:hover::after {
  width: 60%;
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
}

.site-search {
  display: flex;
  align-items: center;
  background: var(--bg-subtle);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-pill);
  overflow: hidden;
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast), background-color var(--transition-fast);
}

.site-search:focus-within {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(230, 57, 70, 0.12);
  background: var(--bg-card);
}

.site-search input {
  width: 180px;
  padding: 8px 14px;
  border: none;
  background: transparent;
  font-size: 0.875rem;
  color: var(--text-main);
  outline: none;
  transition: width var(--transition-base);
}

.site-search input::placeholder {
  color: var(--text-muted);
}

.site-search input:focus {
  width: 220px;
}

.site-search button {
  padding: 8px 16px;
  background: linear-gradient(135deg, var(--primary), var(--primary-dark));
  color: #fff;
  font-size: 0.85rem;
  font-weight: 600;
  white-space: nowrap;
  transition: opacity var(--transition-fast), transform var(--transition-fast);
}

.site-search button:hover {
  opacity: 0.9;
  transform: scale(1.02);
}

#theme-toggle,
#menu-toggle {
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  background: var(--bg-subtle);
  border: 1px solid var(--border-color);
  font-size: 1.1rem;
  line-height: 1;
  transition: background-color var(--transition-fast), transform var(--transition-bounce), border-color var(--transition-fast), box-shadow var(--transition-fast);
}

#theme-toggle:hover,
#menu-toggle:hover {
  background: var(--bg-card);
  border-color: var(--primary);
  transform: scale(1.1) rotate(8deg);
  box-shadow: var(--shadow-sm);
}

#menu-toggle {
  display: none;
}

/* ========== 主内容 ========== */
main {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px 60px;
}

main > section {
  margin-top: 56px;
}

main > section:first-child {
  margin-top: 0;
}

/* ========== 首屏 Banner ========== */
.hero {
  position: relative;
  margin-top: 24px;
  border-radius: var(--radius-xl);
  overflow: hidden;
  background: linear-gradient(135deg, #1d3557 0%, #2a9d8f 50%, #e63946 100%);
  box-shadow: var(--shadow-xl);
  isolation: isolate;
}

.hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    radial-gradient(circle at 15% 20%, rgba(230, 57, 70, 0.4), transparent 50%),
    radial-gradient(circle at 85% 80%, rgba(42, 157, 143, 0.4), transparent 50%),
    radial-gradient(circle at 50% 50%, rgba(233, 196, 106, 0.15), transparent 60%);
  z-index: 0;
  animation: heroGlow 12s ease-in-out infinite alternate;
}

@keyframes heroGlow {
  0% {
    opacity: 0.7;
    transform: scale(1);
  }
  100% {
    opacity: 1;
    transform: scale(1.08);
  }
}

.hero-slider {
  position: relative;
  z-index: 1;
  min-height: 420px;
}

.slide {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  text-align: center;
  padding: 48px 40px;
  opacity: 0;
  visibility: hidden;
  transform: translateY(24px) scale(0.98);
  transition: opacity 0.7s cubic-bezier(0.4, 0, 0.2, 1), transform 0.7s cubic-bezier(0.4, 0, 0.2, 1), visibility 0.7s;
  pointer-events: none;
}

.slide.active {
  opacity: 1;
  visibility: visible;
  transform: translateY(0) scale(1);
  pointer-events: auto;
  position: relative;
}

.slide-visual {
  width: 220px;
  height: auto;
  margin-bottom: 24px;
  border-radius: var(--radius-lg);
  box-shadow: 0 16px 48px rgba(0, 0, 0, 0.35);
  opacity: 0.95;
  transition: transform var(--transition-slow);
}

.slide.active .slide-visual {
  animation: floatVisual 6s ease-in-out infinite;
}

@keyframes floatVisual {
  0%,
  100% {
    transform: translateY(0) rotate(0deg);
  }
  50% {
    transform: translateY(-12px) rotate(1.5deg);
  }
}

.slide h2 {
  font-size: clamp(1.6rem, 4vw, 2.6rem);
  font-weight: 800;
  line-height: 1.25;
  color: #fff;
  margin-bottom: 16px;
  letter-spacing: -0.02em;
  text-shadow: 0 2px 20px rgba(0, 0, 0, 0.3);
  max-width: 720px;
}

.slide p {
  font-size: clamp(0.95rem, 1.8vw, 1.1rem);
  color: rgba(255, 255, 255, 0.88);
  max-width: 620px;
  margin-bottom: 28px;
  line-height: 1.8;
}

.btn-primary {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 14px 36px;
  background: rgba(255, 255, 255, 0.95);
  color: var(--primary-dark);
  font-size: 1rem;
  font-weight: 700;
  border-radius: var(--radius-pill);
  box-shadow: 0 8px 28px rgba(0, 0, 0, 0.2);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  transition: transform var(--transition-bounce), box-shadow var(--transition-base), background-color var(--transition-fast), color var(--transition-fast);
  position: relative;
  overflow: hidden;
}

.btn-primary::before {
  content: "";
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, var(--primary), var(--accent-warm));
  opacity: 0;
  transition: opacity var(--transition-base);
  z-index: -1;
}

.btn-primary:hover {
  color: #fff;
  transform: translateY(-3px) scale(1.04);
  box-shadow: 0 16px 40px rgba(230, 57, 70, 0.45);
}

.btn-primary:hover::before {
  opacity: 1;
}

.btn-primary:active {
  transform: translateY(-1px) scale(0.99);
}

.slider-dots {
  position: absolute;
  bottom: 20px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  gap: 10px;
  z-index: 5;
}

.dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.4);
  transition: all var(--transition-base);
  position: relative;
}

.dot::after {
  content: "";
  position: absolute;
  inset: -4px;
  border-radius: 50%;
  border: 2px solid transparent;
  transition: border-color var(--transition-base);
}

.dot:hover {
  background: rgba(255, 255, 255, 0.7);
  transform: scale(1.2);
}

.dot.active {
  width: 28px;
  border-radius: var(--radius-pill);
  background: #fff;
  box-shadow: 0 0 12px rgba(255, 255, 255, 0.6);
}

/* ========== 核心问答 ========== */
.intro-answer {
  background: var(--bg-card);
  border-radius: var(--radius-lg);
  padding: 36px 40px;
  box-shadow: var(--shadow-md);
  border: 1px solid var(--border-light);
  position: relative;
  overflow: hidden;
  transition: box-shadow var(--transition-base), transform var(--transition-base), background-color var(--transition-base), border-color var(--transition-base);
}

.intro-answer::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 5px;
  height: 100%;
  background: linear-gradient(180deg, var(--primary), var(--accent-warm), var(--accent-teal));
  border-radius: var(--radius-pill);
}

.intro-answer:hover {
  box-shadow: var(--shadow-lg);
  transform: translateY(-2px);
}

.intro-answer h2 {
  font-size: clamp(1.25rem, 2.5vw, 1.6rem);
  font-weight: 800;
  line-height: 1.4;
  margin-bottom: 18px;
  color: var(--text-main);
  letter-spacing: -0.01em;
}

.intro-answer p {
  color: var(--text-secondary);
  font-size: 1rem;
  line-height: 1.9;
  text-align: justify;
}

/* ========== 通用区块标题 ========== */
main section > h2 {
  font-size: clamp(1.5rem, 3vw, 2rem);
  font-weight: 800;
  line-height: 1.3;
  margin-bottom: 24px;
  letter-spacing: -0.02em;
  color: var(--text-main);
  position: relative;
  padding-left: 18px;
}

main section > h2::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.15em;
  bottom: 0.15em;
  width: 5px;
  border-radius: var(--radius-pill);
  background: linear-gradient(180deg, var(--primary), var(--accent-warm));
  box-shadow: 0 0 12px rgba(230, 57, 70, 0.4);
}

main section > h3 {
  font-size: clamp(1.15rem, 2.2vw, 1.4rem);
  font-weight: 700;
  line-height: 1.4;
  margin-top: 36px;
  margin-bottom: 14px;
  color: var(--text-main);
  letter-spacing: -0.01em;
}

main section > h4 {
  font-size: 1.05rem;
  font-weight: 700;
  margin-top: 22px;
  margin-bottom: 8px;
  color: var(--text-main);
}

main section > p {
  color: var(--text-secondary);
  font-size: 1rem;
  line-height: 1.9;
  margin-bottom: 16px;
  text-align: justify;
}

/* ========== 品牌介绍 ========== */
#about {
  background: var(--bg-card);
  border-radius: var(--radius-lg);
  padding: 40px;
  box-shadow: var(--shadow-md);
  border: 1px solid var(--border-light);
  transition: background-color var(--transition-base), border-color var(--transition-base), box-shadow var(--transition-base);
}

#about h3 {
  padding-bottom: 10px;
  border-bottom: 2px solid var(--border-light);
  position: relative;
}

#about h3::after {
  content: "";
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 48px;
  height: 2px;
  background: linear-gradient(90deg, var(--primary), var(--accent-warm));
  border-radius: var(--radius-pill);
}

/* ========== 热门作品 ========== */
#products {
  background: var(--bg-card);
  border-radius: var(--radius-lg);
  padding: 40px;
  box-shadow: var(--shadow-md);
  border: 1px solid var(--border-light);
  transition: background-color var(--transition-base), border-color var(--transition-base), box-shadow var(--transition-base);
}

#products h4 {
  display: inline-block;
  padding: 6px 16px;
  border-radius: var(--radius-pill);
  font-size: 0.95rem;
  background: linear-gradient(135deg, rgba(230, 57, 70, 0.1), rgba(244, 162, 97, 0.1));
  border: 1px solid rgba(230, 57, 70, 0.15);
  color: var(--primary);
  transition: transform var(--transition-fast), box-shadow var(--transition-fast);
}

#products h4:hover {
  transform: translateX(4px);
  box-shadow: var(--shadow-sm);
}

#products ul {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 16px;
  margin-top: 20px;
}

#products ul li {
  padding: 18px 20px 18px 48px;
  background: var(--bg-subtle);
  border-radius: var(--radius-md);
  border: 1px solid var(--border-light);
  color: var(--text-secondary);
  font-size: 0.95rem;
  line-height: 1.7;
  position: relative;
  transition: transform var(--transition-base), box-shadow var(--transition-base), background-color var(--transition-fast), border-color var(--transition-fast);
}

#products ul li::before {
  content: "✦";
  position: absolute;
  left: 18px;
  top: 18px;
  color: var(--primary);
  font-size: 1rem;
  line-height: 1.7;
  transition: transform var(--transition-bounce);
}

#products ul li:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
  background: var(--bg-card);
  border-color: rgba(230, 57, 70, 0.25);
}

#products ul li:hover::before {
  transform: scale(1.4) rotate(20deg);
}

/* ========== 解决方案 ========== */
#solutions {
  background: var(--bg-card);
  border-radius: var(--radius-lg);
  padding: 40px;
  box-shadow: var(--shadow-md);
  border: 1px solid var(--border-light);
  transition: background-color var(--transition-base), border-color var(--transition-base), box-shadow var(--transition-base);
}

#solutions h3 {
  display: flex;
  align-items: center;
  gap: 10px;
}

#solutions h3::before {
  content: "";
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--primary), var(--accent-warm));
  box-shadow: 0 0 10px rgba(230, 57, 70, 0.5);
  flex-shrink: 0;
}

/* ========== 客户案例 ========== */
#cases {
  background: var(--bg-card);
  border-radius: var(--radius-lg);
  padding: 40px;
  box-shadow: var(--shadow-md);
  border: 1px solid var(--border-light);
  transition: background-color var(--transition-base), border-color var(--transition-base), box-shadow var(--transition-base);
}

#cases article {
  background: var(--bg-subtle);
  border-radius: var(--radius-md);
  padding: 24px 28px;
  margin-bottom: 16px;
  border-left: 4px solid var(--primary);
  transition: transform var(--transition-base), box-shadow var(--transition-base), background-color var(--transition-fast), border-color var(--transition-fast);
}

#cases article:hover {
  transform: translateX(6px);
  box-shadow: var(--shadow-md);
  background: var(--bg-card);
  border-left-color: var(--accent-warm);
}

#cases article h4 {
  margin-top: 0;
  color: var(--primary);
  font-size: 1.05rem;
  margin-bottom: 10px;
}

#cases article p {
  color: var(--text-secondary);
  font-size: 0.95rem;
  line-height: 1.8;
  margin: 0;
}

#cases blockquote {
  background: linear-gradient(135deg, rgba(230, 57, 70, 0.06), rgba(244, 162, 97, 0.06));
  border-radius: var(--radius-md);
  padding: 22px 26px;
  margin-bottom: 14px;
  border: 1px solid rgba(230, 57, 70, 0.1);
  position: relative;
  transition: transform var(--transition-base), box-shadow var(--transition-base), border-color var(--transition-fast);
}

#cases blockquote::before {
  content: """;
  position: absolute;
  top: 4px;
  left: 14px;
  font-size: 3rem;
  line-height: 1;
  color: var(--primary);
  opacity: 0.25;
  font-family: Georgia, serif;
}

#cases blockquote:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-md);
  border-color: rgba(230, 57, 70, 0.25);
}

#cases blockquote p {
  color: var(--text-secondary);
  font-size: 0.95rem;
  line-height: 1.8;
  font-style: italic;
  margin: 0;
  padding-left: 20px;
}

/* ========== 新闻中心 ========== */
#news {
  background: var(--bg-card);
  border-radius: var(--radius-lg);
  padding: 40px;
  box-shadow: var(--shadow-md);
  border: 1px solid var(--border-light);
  transition: background-color var(--transition-base), border-color var(--transition-base), box-shadow var(--transition-base);
}

.news-list {
  display: grid;
  gap: 16px;
}

.news-list li {
  background: var(--bg-subtle);
  border-radius: var(--radius-md);
  padding: 22px 26px;
  border: 1px solid var(--border-light);
  position: relative;
  overflow: hidden;
  transition: transform var(--transition-base), box-shadow var(--transition-base), background-color var(--transition-fast), border-color var(--transition-fast);
}

.news-list li::before {
  content: "";
  position: absolute;
  top: 0;
  left: 0;
  width: 4px;
  height: 100%;
  background: linear-gradient(180deg, var(--accent-teal), var(--secondary));
  transform: scaleY(0);
  transform-origin: top;
  transition: transform var(--transition-base);
}

.news-list li:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
  background: var(--bg-card);
  border-color: rgba(42, 157, 143, 0.3);
}

.news-list li:hover::before {
  transform: scaleY(1);
}

.news-list time {
  display: inline-block;
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--accent-teal);
  background: rgba(42, 157, 143, 0.1);
  padding: 3px 12px;
  border-radius: var(--radius-pill);
  margin-bottom: 10px;
  letter-spacing: 0.02em;
}

.news-list h3 {
  font-size: 1.05rem;
  font-weight: 700;
  margin-bottom: 6px;
  color: var(--text-main);
  line-height: 1.5;
}

.news-list p {
  color: var(--text-secondary);
  font-size: 0.9rem;
  line-height: 1.7;
  margin: 0;
}

/* ========== 技术文章 ========== */
#articles {
  background: var(--bg-card);
  border-radius: var(--radius-lg);
  padding: 40px;
  box-shadow: var(--shadow-md);
  border: 1px solid var(--border-light);
  transition: background-color var(--transition-base), border-color var(--transition-base), box-shadow var(--transition-base);
}

#articles article {
  background: var(--bg-subtle);
  border-radius: var(--radius-md);
  padding: 26px 30px;
  margin-bottom: 18px;
  border: 1px solid var(--border-light);
  transition: transform var(--transition-base), box-shadow var(--transition-base), background-color var(--transition-fast), border-color var(--transition-fast);
  position: relative;
  overflow: hidden;
}

#articles article::after {
  content: "";
  position: absolute;
  top: 0;
  right: 0;
  width: 120px;
  height: 120px;
  background: radial-gradient(circle, rgba(230, 57, 70, 0.08), transparent 70%);
  border-radius: 50%;
  transform: translate(30%, -30%);
  transition: transform var(--transition-slow), opacity var(--transition-base);
  opacity: 0;
}

#articles article:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-lg);
  background: var(--bg-card);
  border-color: rgba(230, 57, 70, 0.2);
}

#articles article:hover::after {
  transform: translate(20%, -20%) scale(1.5);
  opacity: 1;
}

#articles article h3 {
  font-size: 1.15rem;
  font-weight: 700;
  margin-top: 0;
  margin-bottom: 8px;
  color: var(--text-main);
  line-height: 1.5;
  transition: color var(--transition-fast);
}

#articles article:hover h3 {
  color: var(--primary);
}

#articles article time {
  display: inline-block;
  font-size: 0.8rem;
  color: var(--text-muted);
  margin-bottom: 12px;
  font-weight: 500;
}

#articles article p {
  color: var(--text-secondary);
  font-size: 0.95rem;
  line-height: 1.85;
  margin-bottom: 14px;
  text-align: justify;
}

#articles article a {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--primary);
  padding: 6px 0;
  position: relative;
  transition: gap var(--transition-base), color var(--transition-fast);
}

#articles article a::after {
  content: "→";
  transition: transform var(--transition-base);
}

#articles article a:hover {
  gap: 10px;
  color: var(--primary-dark);
}

#articles article a:hover::after {
  transform: translateX(4px);
}

/* ========== 教程 ========== */
#howto {
  background: var(--bg-card);
  border-radius: var(--radius-lg);
  padding: 40px;
  box-shadow: var(--shadow-md);
  border: 1px solid var(--border-light);
  transition: background-color var(--transition-base), border-color var(--transition-base), box-shadow var(--transition-base);
}

#howto ul,
#howto ol {
  margin: 12px 0 20px;
  padding-left: 0;
}

#howto ul li {
  padding: 10px 0 10px 32px;
  position: relative;
  color: var(--text-secondary);
  font-size: 0.95rem;
  line-height: 1.8;
  border-bottom: 1px dashed var(--border-light);
  transition: padding-left var(--transition-base), color var(--transition-fast);
}

#howto ul li:last-child {
  border-bottom: none;
}

#howto ul li::before {
  content: "✓";
  position: absolute;
  left: 0;
  top: 10px;
  width: 20px;
  height: 20px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--accent-teal), var(--secondary));
  color: #fff;
  font-size: 0.7rem;
  font-weight: 700;
  line-height: 1;
}

#howto ul li:hover {
  padding-left: 38px;
  color: var(--text-main);
}

#howto ol {
  counter-reset: howto-step;
}

#howto ol li {
  counter-increment: howto-step;
  padding: 14px 16px 14px 56px;
  position: relative;
  color: var(--text-secondary);
  font-size: 0.95rem;
  line-height: 1.8;
  background: var(--bg-subtle);
  border-radius: var(--radius-sm);
  margin-bottom: 10px;
  border: 1px solid var(--border-light);
  transition: transform var(--transition-base), box-shadow var(--transition-base), background-color var(--transition-fast), border-color var(--transition-fast);
}

#howto ol li::before {
  content: counter(howto-step);
  position: absolute;
  left: 14px;
  top: 50%;
  transform: translateY(-50%);
  width: 28px;
  height: 28px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--primary), var(--accent-warm));
  color: #fff;
  font-size: 0.8rem;
  font-weight: 700;
  box-shadow: 0 2px 8px rgba(230, 57, 70, 0.3);
  transition: transform var(--transition-bounce), box-shadow var(--transition-base);
}

#howto ol li:hover {
  transform: translateX(6px);
  box-shadow: var(--shadow-md);
  background: var(--bg-card);
  border-color: rgba(230, 57, 70, 0.2);
}

#howto ol li:hover::before {
  transform: translateY(-50%) scale(1.15);
  box-shadow: var(--shadow-glow);
}

/* ========== FAQ ========== */
#faq {
  background: var(--bg-card);
  border-radius: var(--radius-lg);
  padding: 40px;
  box-shadow: var(--shadow-md);
  border: 1px solid var(--border-light);
  transition: background-color var(--transition-base), border-color var(--transition-base), box-shadow var(--transition-base);
}

#faq details {
  background: var(--bg-subtle);
  border-radius: var(--radius-md);
  margin-bottom: 12px;
  border: 1px solid var(--border-light);
  overflow: hidden;
  transition: box-shadow var(--transition-base), border-color var(--transition-fast), background-color var(--transition-fast);
}

#faq details[open] {
  box-shadow: var(--shadow-md);
  border-color: rgba(230, 57, 70, 0.2);
  background: var(--bg-card);
}

#faq details:hover {
  border-color: rgba(230, 57, 70, 0.3);
}

#faq summary {
  padding: 18px 48px 18px 22px;
  font-weight: 600;
  font-size: 0.98rem;
  color: var(--text-main);
  cursor: pointer;
  position: relative;
  list-style: none;
  user-select: none;
  transition: color var(--transition-fast), background-color var(--transition-fast);
  line-height: 1.6;
}

#faq summary::-webkit-details-marker {
  display: none;
}

#faq summary::after {
  content: "+";
  position: absolute;
  right: 20px;
  top: 50%;
  transform: translateY(-50%);
  width: 26px;
  height: 26px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--primary), var(--accent-warm));
  color: #fff;
  font-size: 1.1rem;
  font-weight: 700;
  line-height: 1;
  transition: transform var(--transition-bounce), box-shadow var(--transition-base);
}

#faq details[open] summary::after {
  content: "−";
  transform: translateY(-50%) rotate(180deg);
  box-shadow: var(--shadow-glow);
}

#faq summary:hover {
  color: var(--primary);
  background: rgba(230, 57, 70, 0.04);
}

#faq details p {
  padding: 0 22px 20px;
  color: var(--text-secondary);
  font-size: 0.93rem;
  line-height: 1.85;
  margin: 0;
  animation: faqFadeIn 0.35s ease;
}

@keyframes faqFadeIn {
  from {
    opacity: 0;
    transform: translateY(-6px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* ========== 联系我们 ========== */
#contact {
  background: linear-gradient(135deg, var(--secondary-dark), var(--secondary));
  border-radius: var(--radius-lg);
  padding: 44px 40px;
  box-shadow: var(--shadow-lg);
  color: #fff;
  position: relative;
  overflow: hidden;
}

#contact::before {
  content: "";
  position: absolute;
  top: -60px;
  right: -60px;
  width: 200px;
  height: 200px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(230, 57, 70, 0.4), transparent 70%);
  animation: contactGlow 8s ease-in-out infinite alternate;
}

#contact::after {
  content: "";
  position: absolute;
  bottom: -80px;
  left: -40px;
  width: 240px;
  height: 240px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(233, 196, 106, 0.25), transparent 70%);
  animation: contactGlow 10s ease-in-out infinite alternate-reverse;
}

@keyframes contactGlow {
  0% {
    transform: scale(1) translate(0, 0);
    opacity: 0.6;
  }
  100% {
    transform: scale(1.3) translate(10px, 10px);
    opacity: 1;
  }
}

#contact h2 {
  color: #fff;
  position: relative;
  z-index: 1;
}

#contact h2::before {
  background: linear-gradient(180deg, var(--accent), var(--accent-warm));
}

#contact address {
  font-style: normal;
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 16px;
}

#contact address p {
  background: rgba(255, 255, 255, 0.1);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border: 1px solid rgba(255, 255, 255, 0.15);
  border-radius: var(--radius-md);
  padding: 16px 20px;
  color: rgba(255, 255, 255, 0.92);
  font-size: 0.92rem;
  line-height: 1.6;
  margin: 0;
  transition: transform var(--transition-base), background-color var(--transition-fast), border-color var(--transition-fast), box-shadow var(--transition-base);
}

#contact address p:hover {
  transform: translateY(-4px);
  background: rgba(255, 255, 255, 0.16);
  border-color: rgba(255, 255, 255, 0.3);
  box-shadow: 0 8px 24px rgba(0, 0, 0, 0.2);
}

#contact address a {
  color: var(--accent);
  font-weight: 600;
  transition: color var(--transition-fast);
}

#contact address a:hover {
  color: var(--accent-warm);
  text-decoration: underline;
}

/* ========== 网站地图 ========== */
#sitemap {
  background: var(--bg-card);
  border-radius: var(--radius-lg);
  padding: 40px;
  box-shadow: var(--shadow-md);
  border: 1px solid var(--border-light);
  transition: background-color var(--transition-base), border-color var(--transition-base), box-shadow var(--transition-base);
}

#sitemap ul {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(160px, 1fr));
  gap: 12px;
}

#sitemap a {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 12px 18px;
  background: var(--bg-subtle);
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-light);
  color: var(--text-secondary);
  font-size: 0.9rem;
  font-weight: 500;
  transition: transform var(--transition-base), background-color var(--transition-fast), color var(--transition-fast), border-color var(--transition-fast), box-shadow var(--transition-base);
}

#sitemap a::before {
  content: "▸";
  color: var(--primary);
  font-size: 0.8rem;
  transition: transform var(--transition-base);
}

#sitemap a:hover {
  transform: translateX(6px);
  background: var(--bg-card);
  color: var(--primary);
  border-color: rgba(230, 57, 70, 0.3);
  box-shadow: var(--shadow-sm);
}

#sitemap a:hover::before {
  transform: translateX(3px);
}

/* ========== 友情链接 ========== */
#links {
  background: var(--bg-card);
  border-radius: var(--radius-lg);
  padding: 40px;
  box-shadow: var(--shadow-md);
  border: 1px solid var(--border-light);
  transition: background-color var(--transition-base), border-color var(--transition-base), box-shadow var(--transition-base);
}

#links ul {
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
}

#links a {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 10px 22px;
  background: linear-gradient(135deg, rgba(230, 57, 70, 0.08), rgba(244, 162, 97, 0.08));
  border: 1px solid rgba(230, 57, 70, 0.15);
  border-radius: var(--radius-pill);
  color: var(--text-secondary);
  font-size: 0.9rem;
  font-weight: 500;
  transition: transform var(--transition-bounce), background-color var(--transition-fast), color var(--transition-fast), border-color var(--transition-fast), box-shadow var(--transition-base);
}

#links a::before {
  content: "🔗";
  font-size: 0.85rem;
  transition: transform var(--transition-bounce);
}

#links a:hover {
  transform: translateY(-3px) scale(1.03);
  background: linear-gradient(135deg, var(--primary), var(--accent-warm));
  color: #fff;
  border-color: transparent;
  box-shadow: 0 8px 24px rgba(230, 57, 70, 0.35);
}

#links a:hover::before {
  transform: rotate(-20deg) scale(1.15);
}

/* ========== 页脚 ========== */
footer {
  background: var(--bg-subtle);
  border-top: 1px solid var(--border-light);
  margin-top: 60px;
  padding: 48px 24px 32px;
  transition: background-color var(--transition-base), border-color var(--transition-base);
}

footer section {
  max-width: var(--max-width);
  margin: 0 auto;
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 28px;
}

footer h2 {
  font-size: 1rem;
  font-weight: 700;
  margin-bottom: 10px;
  color: var(--text-main);
  display: flex;
  align-items: center;
  gap: 8px;
}

footer h2::before {
  content: "";
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--primary), var(--accent-warm));
  flex-shrink: 0;
  box-shadow: 0 0 8px rgba(230, 57, 70, 0.5);
}

footer p {
  color: var(--text-muted);
  font-size: 0.85rem;
  line-height: 1.8;
  margin: 0;
}

footer a {
  color: var(--primary);
  font-weight: 500;
}

footer a:hover {
  color: var(--primary-dark);
  text-decoration: underline;
}

.back-top {
  max-width: var(--max-width);
  margin: 32px auto 0;
  text-align: center;
  padding-top: 24px;
  border-top: 1px solid var(--border-light);
}

.back-top a {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 32px;
  background: linear-gradient(135deg, var(--primary), var(--primary-dark));
  color: #fff;
  font-size: 0.9rem;
  font-weight: 600;
  border-radius: var(--radius-pill);
  box-shadow: 0 4px 16px rgba(230, 57, 70, 0.3);
  transition: transform var(--transition-bounce), box-shadow var(--transition-base), opacity var(--transition-fast);
}

.back-top a::before {
  content: "↑";
  font-size: 1rem;
  transition: transform var(--transition-bounce);
}

.back-top a:hover {
  transform: translateY(-4px);
  box-shadow: 0 12px 32px rgba(230, 57, 70, 0.45);
  color: #fff;
  text-decoration: none;
}

.back-top a:hover::before {
  transform: translateY(-3px);
}

/* ========== 滚动动画 ========== */
.reveal {
  opacity: 0;
  transform: translateY(32px);
  transition: opacity 0.7s cubic-bezier(0.4, 0, 0.2, 1), transform 0.7s cubic-bezier(0.4, 0, 0.2, 1);
  will-change: opacity, transform;
}

.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

.reveal-delay-1 {
  transition-delay: 0.1s;
}

.reveal-delay-2 {
  transition-delay: 0.2s;
}

.reveal-delay-3 {
  transition-delay: 0.3s;
}

/* ========== 响应式 ========== */
@media (max-width: 1024px) {
  .header-inner {
    padding: 0 18px;
    gap: 14px;
  }

  .main-nav a {
    padding: 8px 10px;
    font-size: 0.85rem;
  }

  .site-search input {
    width: 140px;
  }

  .site-search input:focus {
    width: 170px;
  }

  main {
    padding: 0 18px 48px;
  }

  .hero-slider {
    min-height: 380px;
  }

  .slide {
    padding: 40px 28px;
  }
}

@media (max-width: 860px) {
  .main-nav {
    position: fixed;
    top: var(--header-height);
    left: 0;
    right: 0;
    background: var(--bg-glass);
    backdrop-filter: blur(24px) saturate(180%);
    -webkit-backdrop-filter: blur(24px) saturate(180%);
    border-bottom: 1px solid var(--border-light);
    padding: 16px 20px;
    transform: translateY(-120%);
    opacity: 0;
    visibility: hidden;
    transition: transform var(--transition-base), opacity var(--transition-base), visibility var(--transition-base);
    z-index: 999;
    box-shadow: var(--shadow-lg);
    max-height: calc(100vh - var(--header-height));
    overflow-y: auto;
  }

  .main-nav.open {
    transform: translateY(0);
    opacity: 1;
    visibility: visible;
  }

  .main-nav ul {
    flex-direction: column;
    align-items: stretch;
    gap: 4px;
  }

  .main-nav a {
    padding: 12px 16px;
    font-size: 0.95rem;
    border-radius: var(--radius-sm);
    text-align: left;
  }

  .main-nav a::after {
    display: none;
  }

  .main-nav a:hover {
    background: rgba(230, 57, 70, 0.08);
    transform: translateX(4px);
  }

  #menu-toggle {
    display: flex;
  }

  .site-search {
    display: none;
  }

  .header-actions {
    margin-left: auto;
  }

  .hero-slider {
    min-height: 360px;
  }

  .slide-visual {
    width: 180px;
  }

  .intro-answer,
  #about,
  #products,
  #solutions,
  #cases,
  #news,
  #articles,
  #howto,
  #faq,
  #contact,
  #sitemap,
  #links {
    padding: 28px 24px;
  }

  #contact {
    padding: 32px 24px;
  }

  footer {
    padding: 36px 18px 28px;
  }

  footer section {
    grid-template-columns: 1fr;
    gap: 22px;
  }
}

@media (max-width: 600px) {
  :root {
    --header-height: 60px;
  }

  body {
    font-size: 15px;
  }

  .header-inner {
    padding: 0 14px;
    gap: 10px;
  }

  .logo-text {
    font-size: 1.05rem;
  }

  .logo svg {
    width: 32px;
    height: 32px;
  }

  #theme-toggle,
  #menu-toggle {
    width: 36px;
    height: 36px;
    font-size: 1rem;
  }

  main {
    padding: 0 14px 40px;
  }

  main > section {
    margin-top: 40px;
  }

  .hero {
    margin-top: 16px;
    border-radius: var(--radius-lg);
  }

  .hero-slider {
    min-height: 340px;
  }

  .slide {
    padding: 32px 20px;
  }

  .slide-visual {
    width: 150px;
    margin-bottom: 18px;
  }

  .slide h2 {
    font-size: 1.4rem;
    margin-bottom: 12px;
  }

  .slide p {
    font-size: 0.9rem;
    margin-bottom: 22px;
  }

  .btn-primary {
    padding: 12px 28px;
    font-size: 0.92rem;
  }

  .slider-dots {
    bottom: 14px;
  }

  .dot {
    width: 8px;
    height: 8px;
  }

  .dot.active {
    width: 24px;
  }

  .intro-answer,
  #about,
  #products,
  #solutions,
  #cases,
  #news,
  #articles,
  #howto,
  #faq,
  #contact,
  #sitemap,
  #links {
    padding: 22px 18px;
    border-radius: var(--radius-md);
  }

  main section > h2 {
    font-size: 1.3rem;
    padding-left: 14px;
    margin-bottom: 18px;
  }

  main section > h2::before {
    width: 4px;
  }

  main section > h3 {
    font-size: 1.1rem;
    margin-top: 26px;
  }

  main section > p {
    font-size: 0.92rem;
    line-height: 1.8;
  }

  #products ul {
    grid-template-columns: 1fr;
  }

  #products ul li {
    padding: 16px 16px 16px 42px;
    font-size: 0.9rem;
  }

  #products ul li::before {
    left: 14px;
    top: 16px;
  }

  #cases article {
    padding: 18px 20px;
  }

  #cases blockquote {
    padding: 18px 20px;
  }

  #cases blockquote p {
    padding-left: 16px;
    font-size: 0.9rem;
  }

  .news-list li {
    padding: 18px 20px;
  }

  #articles article {
    padding: 20px 22px;
  }

  #articles article h3 {
    font-size: 1.05rem;
  }

  #articles article p {
    font-size: 0.9rem;
  }

  #howto ol li {
    padding: 12px 14px 12px 50px;
    font-size: 0.9rem;
  }

  #howto ol li::before {
    left: 12px;
    width: 24px;
    height: 24px;
    font-size: 0.75rem;
  }

  #faq summary {
    padding: 15px 44px 15px 18px;
    font-size: 0.92rem;
  }

  #faq summary::after {
    right: 16px;
    width: 24px;
    height: 24px;
    font-size: 1rem;
  }

  #faq details p {
    padding: 0 18px 16px;
    font-size: 0.88rem;
  }

  #contact {
    padding: 28px 18px;
  }

  #contact address {
    grid-template-columns: 1fr;
    gap: 12px;
  }

  #contact address p {
    padding: 14px 16px;
    font-size: 0.88rem;
  }

  #sitemap ul {
    grid-template-columns: repeat(2, 1fr);
    gap: 8px;
  }

  #sitemap a {
    padding: 10px 14px;
    font-size: 0.85rem;
  }

  #links ul {
    gap: 10px;
  }

  #links a {
    padding: 9px 18px;
    font-size: 0.85rem;
  }

  footer {
    padding: 28px 14px 22px;
    margin-top: 40px;
  }

  footer h2 {
    font-size: 0.95rem;
  }

  footer p {
    font-size: 0.82rem;
  }

  .back-top a {
    padding: 10px 26px;
    font-size: 0.85rem;
  }
}

@media (max-width: 380px) {
  .logo-text {
    display: none;
  }

  .slide h2 {
    font-size: 1.25rem;
  }

  #sitemap ul {
    grid-template-columns: 1fr;
  }
}

/* ========== 减少动画偏好 ========== */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }

  .reveal {
    opacity: 1;
    transform: none;
  }
}

/* ========== 打印样式 ========== */
@media print {
  #site-header,
  .hero,
  .back-top,
  #theme-toggle,
  #menu-toggle,
  .site-search,
  .slider-dots {
    display: none !important;
  }

  body {
    background: #fff;
    color: #000;
  }

  main {
    max-width: 100%;
    padding: 0;
  }

  a {
    color: #000;
    text-decoration: underline;
  }
}